Pod is often used like this PODBot. That's a bot in a CSFPS game. That first name gave them Botman (Original creator).
So POD means "Ping Of Death".
Becouse all bots had Ping of 5 witch is Ping Of Death.
That means 5ms response and almost certain hs - that was first bots now they are improved so they are more 'representing' human opponent.

In a FPS game (CS for example) probably on lan or internet game

Person1: L0L look at Person2's POD!!!
Person3: LMAO. He sure is Bot. I didn't know they started adding Bots to this server oO
Person1: Me, neither...